Torch



May 2, `1944.A '.1. c. CROWLEY TORCH Filed June le, 1939 2 Sheets-Sheetl INVENTOR. .l/#v C. Ceowr ATTORNEYS May .2, J. Q CROWLEY TORCH FiledJune 16, 1939 2 Sheets-Sheet 2 f 40 45 I;- ,H. ?4 21 2'? I l 23 43 32*fall/@7110 fNvENToR.

Jol/N C. Ceow/.sv

fw jl/mmf ATTORNEYS Patented May 2, 1944 ITEDv STAT PATENT OFFICE2,348,110

Y Tonenn J chnC. GroWley,.Cleveland HilghtstOhio assignor to The DillManufacturing Company, Clevel land; hio, a corporation of Ohio A YAppiicarion June-is; 1939; serialfno. 279399 2 Claims. '('ICL 1587-214)This invention relates to a cuttingl torch` or blow pipe adapted forcuttingl or welding metal or for other similar purposes.Av

A cutting torohor blow pipe' of theY type to which the present inventionrelates isconnected` to a source of suitable inflammable gas underpressurev and also to 'a source of oxygen under pressure, the gas andoxygen being suitably mixedA in the torch to produce the required andfcorrect combustible mixture. There is also provision in the torch forissuing'V therefromV a jet ofA highI pressure oxygen'that is not mixedwith the inflammable gas;

means of the: name produced at the nozzle ofthe torch bythe, ignitedcombustible mixture of gas,

An object. argine; invention; iste. provide an improved andnoyel cutting-torclior blow pipe whichis. sc ,con'structed asfto be. readilyroperated, require aiminimum amount; 0i attention. on the part of the,operatohandwhieh' extremely simple in construction. V

Another object is to'l provide.,v acul',t;ing` torch or blow pipeinwhich the handle is of` improved construction..v andl of`V suchcharactery and shape that it. canrbe conveniently handled -bytheoperator and has the gas'vand oxygenpassageseand the val-ve seatslandvalve chambers so located and so, formed therein as to enable the handleto be.

eiciently and economically manufactured;

Another object is to provide a cuttingtorch or blow pipe wherein themanual control'members for the valves controlling the admission of gasand :oxygen toy thelow.` pressurepassages of the torch andA for thevalve-controlling the high pressure oxygen are conveniently`arranged-tol promote efficient* operationofthe cutting torch or blowpiperbyithe;operator;A g z More speciiically anvobj ectl of the;invention is to provide in a cutting torch; orblow pipe.; a handlewherein the. valve. controlling the pas sageof highpressureoxygentothe'tipl is .located onftheupper side 'of 'the handle intermediatetheendsrithereof; while the. operating member for the valvesthatfco'ntrolthe passage of'lowl pres- When a torch lof this kind; isiusedA to cut metal'themetall isA rst preheated' byV sure oxygen. andtgasthrough'thetorch to thetip;

is: located. onl the bottom: or-Aundersid'e of! thefhandle: so, thatitiv can be operated conveniently by; either a.right'handed or aleft-handed oper-'-r ator.

AJ still' further object istoprovidein a cutting torch or: blow pipeV anoperating sha-ft forL thevalves that control! the passageA of lowpressure gas and oxygen through the torch to the tipe which is soconstructed'th'at it operates both the valves and also acts to clamp thevalves in closed position.

Another object `is-tofprovide an--improved-cutting torch or blowpipe--wherein the handle and*` they valves mountedl therein arel soconstructed that the same may be read-ilyassembled and disassembled.

`Another object is" to providea cuttingtorch or b1ow-pipe wherein the1tubesthatY conduct the high' and lowpressure oxygen and; the'inflammablegas4 from thehandle'toy they mixing 'chamber may be readily clamped andsealed' in the end o f the handle in such manner as to beapplicable toand removable' from the handle as a unit.k

A still further object is` to provide' a cutting torch or blow pipewherein the head of thie'torch' or blow pipe to which the Vtip is"lconnected'is pro-f vided with an improvedv mixing` chamber:

y A more specicj object ofj'the inventioriis: to provide in the head ofa cutting torch or blow pipe an improved mixing chamber for the lowpressure gas and oxygen that canbe 'closed-'by separateoriiiceplugsindividually removable .from

the. head from opposite sides thereof, while ajremovable, mixingmemberVis arranged inthechamber and is provided with a barile separating theinowinglow pressure; gas andoxygen.

A, still iurtherobject-of the invention. is. to provide an improvedtip:for a' cutting torch or blow pipe and whichv isfso-constructed that. it

may' be readily assembledand the -variousparts thereof held in'theirproper relative positions.

Further andj additional objects and advantages not; hereinbefore referredftoland including amongL otherv things: simphcity.-oi:d'esn;Voperation' and assembly Voftheftorch as a whole, as .wellgas o ftthecomponent parts thereof, will become,r r1; o 1e;1u3,vparent hereinafterduring the detailed description` whichi is to follow vof! ank embodimentoff theL invention; The embodiment. ofi thexinvention. to bedescribed.inldetailihereiniis illustratedinithe accompanyingdrawingswherein, f

Fig. l isan' elevational view'fnV areducedscalelf pressure side of thecutting torch or blow pipe being shown in the open position.

Fig. 4 is a View similar to Fig. 3 but shows thev y valves controllingtheincoming gas and oxygen for the low pressure side of thejcuttingtorchgo' blow pipe in closed position.

Fig. 5 is a fragmentary sectional View direction of the arrows.

Fig. 6 is a fragmentary sectional View'of that' portion of -the handlewhereinare located the automatic flow control-mechanisms for the gas andoxygen and is taken substantially on "line 6 6 of Fig. 1, looking intherdirection ofthe arrows. 5

Fig. 7 is a fragmentary sectional view through that portion of thehandle containing the manually operated control valve for the incominginammable gas and is taken substantially on line 1- 1 of Fig. 2, lookingin the direction of the arrows. Y

Fig. 8 is a detail sectional View of the head of the cutting torch orblow lpipe and is taken through the mixing chamber thereof substantiallyon irregular line -Hof Fig. l, looking in the direction of the arrows..i I I Fig. 9 isa fragmentary sectional View showing a slightly modifiedform ofcontrol valve for the high pressure oxygen thanthat shown -inFig. 2. Q Fig. 10 is a detail sectional view-,through the tip or nozzleand is taken substantially online IL-I of Fig. 2,.looking in thedirection of the arrows.

Fig. 11 yis a detail Sectionai View' through the tip or nozzle and istaken' substantially on line II-II of Fig. 2, lookingninvthe directionof the arrows. Y A Thelcutting torch or blow' pipe'shown in the drawingscomprises a 'handle'A-f and a .tube orl hand grip porti'onjBlconnectir'i'gv the handle' 'A' with the head C that haslsecured theretothe tip c'irnozzleD.V Y Y Thehandle A 'comprises' a body I0 that ispreferably rectangular ink shape,'as illustrated, to

facilitate'the handling of the' cutting torch or blow pipe by theoperator. The passages in the body ID for the oxygen and inflammable gasare cored in the side of the body and are sealed by suitable sheetpacking and a cover plate as will later be explained in detail, with theresult that the body ID constitutes in effect a manifold.

K Y taken substantially on line 5-5 of Fig." 3,' looking i'n the 'Therear end of the body I0 is provided with a pair of vertically spacedtapered. threadedfre'- cessesf II,as viewed in thek drawings, andvtheserecesses havescrewed therein suitable tapered fittings VI2 that areconnected' to conduits i3' and I4 extending, respectively, to a sourceof oxygen under pressure and a source of inammable gas underlpressure. Yi

The.body"l0 adjacentA itsrear endyas viewed in Fig. 2, is providedwith'a pair .of parallel vertically spaced longitudinallypextending passagesi5v andIIi-whch have one of their ends communicating withthe recesses,II and their opposite ends with short passeusesY I'I and I3,respectively, that extend perendicularly to the passages I5 and I6 in adirection transversely of the body I0, as clearly shown in Figs. A'3, 4and '7.

The passage II extends from the passage I5 laterally to both sides ofthe passage I5 and has its left hand end, as viewed in Figs. 3 and 4,communicating with a recess or counterbore I9, which, in turn,communicates with a larger counterbore 20 provided in its bottom walladjacent its circumference with a concave annular groove in which aportion of a valve later to be de- Vscribed is located and clamped. Theend of the v passage II opposite to the counterbore I9 is incommunication with an elongated cored groove or recess Y2I that-,extendslongitudinally of the lbody I3 and constitutes, when sealed by suitablepacking, as will later be explained, a passage for .i the high pressureoxygen forming the cutting jet.

rIhe counterbore I9 is connected to an elongated cored recess or groove23 by means of a small passage 22 in the'body IIJ and extending from thecounterbore I9 to-said groove `cr recess 23, see Fig. 3. The groove orrecess 23 when sealed byv the'packing above mentioned forms a passagethat extends longitudinally in the body Irrin parallelvrelation to thepassage 2I and is inl communication with the automatic flowcontrol'valve for the low` pressure oxygen as will later be explained. a

The passageIB places the passage I6 in communication with a counterboreor recess 24 similar to the counterbore or recess I9 and arranged invertical alignment therewith, as clearly shown in Figs. l, 2, 3 and 4.The counterbore 24 is in communication with an elongated cored grooveor'recess 25 by means of a passage 26 extending transversely of thebody, as clearly shown in Figs. 2 and 7. rThe recess or groove 25 whensealed by the packing hereinbefore referred to constitutes a passagethat extends longitudinally of the body I0 and in parallel relation tothe passages 2I and 23, as clearly shown in Figs. 2, 3 and 4. Thevcounterbore 24 terminates at its outer end in a counterbore 26', whichis similar to the counterbore 20 previously referred to, and

in lthe form of exible rubber discs provided onr one side and adjacenttheir circumferences with annular beads 28 that tjinto the concaveannular grooves in the bottom wall of the counterbores or recesses 20and26, as clearly ,shown in Figs. 3 and 4. rIfhe valves' 21 overlie thepassages II and I8 and at their central point and on the same Vsidethereof as the annular beads 28 are each provided with a convex knob 29in line with said passages, and these knobs act as valves to close thepassages I'I and I8r when the disks are distorted.

VThe body I0 is provided with a rectangular recess 30 extending fromadjacent the top edge to adjacent the bottom edge of the body andcentered over the counterbores 2 and 26. A rectangular block 3|, seeFigs. 1, 3 and 4, is secured in the recess 30 by suitable securingmeans, such as screws or the like, and said block acts to clamp theflexible rubber disks forming the valves 21 in position, asy clearlyindicated'in Figs. 3 and 4. The block 3| is provided centrally thereofwith a vertically disposed bearing opening, as viewed in Figs. 3 and 4,in which is rotatably mounted a shaft 32 that hasa fianged upperend `33located .in ,ancounterbore concentric with the bearing.

opening in theV block 3|, wherefore saidshaft 32 can rotate in saidopening but'is held against endwise movement therein by the flange 33located in said counterbore and engaging with the underside of thehandle bodyv that overlies the recess 36.

The shaft 32 is provided intermediate its ends and in horizontalalignment, as viewed in Figs. 3

and 4, with the passages Il and I8, with cam portions 34 that are inoperative engagement with the flat sides of plungers 35 slidably mountedin vertically spaced openings formed in the block 3i and extendinglaterally of the bearing opening in said block. The plungers 35 haverounded ends that are in engagement with the valves 27 at the centerthereof, Wherefore when the 'shaft 32 is rotated in the proper directionthe camming portions 343 will act to force the plungers 35 from theposition shown in Fig. 3 to the position shown in Fig. 4, with theresult that the rounded ends of the plungers flex or distort the valves21 and force the knobs 23 thereof into the passages Il and i3 and sealthe same so that oxygen and gas cannot pass from said passages into thecounterbores i9 and 2d. The camming portions 34 serve to lock the valvesin closed position until the shaft 32 is manually turned.

The operating shaft 32 extends through an opening in the handle body IGto the underside of the handle and has secured thereto an operatingmember or lever 35, as clearly shown in Figs. 3, 4 and 5. The operatingmember or lever 35 is provided With a recess in which is located aspring-pressed detent ball 3l that cooperates with depressions 33 and 35formed in the underside of the handle body lll to hold the operatingmember or lever 35 and the shaft 32 in either one of two operativepositions which, in this instance, represent rotative movement of theshaft 32 through 136.' Therefore it will be seen that the depressions 38and 39 and the detent 3l form suitable spring points that maintain theparts in the proper positions when the valves lare opened or closed. Itwill also be noted that "the operating member or lever 3S being locatedVbeneath the handle A can be moved to either one of its two operativepositions with equal facility by either a right or a left-handedoperator.

The open sides of the recesses or grooves LV 23 and 25, as well as othercored recesses or grooves formed in the side of the handle body l0, andlater to be referred to, are closed and sealed to form passages by asuitable sheet packing 40 arranged in a recess l formed in the sideofthe handle body i5 and clamped in said recess by means of plates 132 andd3, see Figs. 3, 4 and 6, which platesare secured to the handle body lby suitable means such as securing screwsv The passage 23 extendscentrally and longitudinally of the handle body l il to beneath a,circular recess 44 formed intermediate the ends of the body lil. Thepassage 23 is connected to the circular recess M by means of a threadedopening 45 located at `the center vof the bottom of the recess M.. 'p

The passage 25 extends forwardly and longitu-` dinally-of the handlebodyit and is provided With a lateral oil-set 25a that is incommunicationthrough a threaded opening with a circula recess 46 corresponding to therecessd. The recesses d and'@ are substantially .identical and theautomatic pressure responsiveflow control mechanisms` arranged in eachrecess are identical andpaot to automatically ,control the flowof thegas and ,oxygen to the head and tip-of the cutting torch cr blow pipe.Inasmuch as these mechanisms are identical it will only be necessaryherein to describe one of the mechanisms.

As shownin the drawings, the recesses 44 and d5' are longitudinallyspaced in the handle body I3 and have at their inner ends centrallyarranged smaller internally threaded openings, such as the openings 45which communicatefwith recesses 4l! and 45 and the passages 23 and 25arespectively. Threaded bushings 41 are screwed into the small centrallylocated openings 45 and these bushings are provided with annularlocating. shoulders 23 which engage the inner or end walls of therecesses M and 45 when the bushings are properly positioned. The outerends of the bushings lll, that is the upper ends thereof as viewed inFig. 6, are provided with inwardly extending annular flanges 45 for apurpose which will later become clear. Y

Diaphragme or bellows 5@ are mounted in the recesses d and 45 and theseldiaphragms or bellows have their inner ends secured to and closed byflanged cup-shaped members 5l. The outer endsvof thel diaphragms orbellows 5S] are closed by'and securedy to rectangular closure plates 52mounted inY recesses formed in the handle body lll and secured inposition by'suitable means,v

such as screws `or the like, see Figs. 1 and 6.

It will benoted that the handle body l is provided with suitablerecesses to receive gaskets 53 Y that are engaged by the closure plates52'r and form an effective seal therewith to prevent the escape of gasor oxygen around the edges of the closure plates. The closure plates 52are proyided withicentral threadedopenings for a purpose later to beexplained.

The cup-shaped members 5I are internally threaded and have screwedtherein clamping collars 54 which clamp in position the bases of valveposts 55 -that extend into the bushings 41, as clearly indicated in Fig.6. The valve posts; 55 are provided with centrally locatedlongitudinallyextending bores 56, the inner ends of which vare4inlcommuni cation with one or more radially extending' preferablyrectangular openings 51, while the outer ends are in communication withradially extending openings or passages 58. The

bottoms of the cup members di are provided with centrally disposedoutwardly extending projectionsV 53 which receive one of the ends ofcoil springs Bil that rabut against the cupv members and have theiropposite ends extending into and abutting against cup-shaped adjustingnuts 6l, in turn, screwed into threaded bushings 52 mounted in thecentralopenings in the closure plates 52. It will be seen that when itis desired toga-djust thetension ofthe springs 6b it will'be necessarymerely. to turn the adjusting nuts 6| in the proper directionto vary thetension of the springs in the amount desired. A

It vwill be understood that the diaphragms or bellows 5%) are merely ofsufficient strength to remain extended under atmospheric pressure orsubstantially atmospheric pressure, and vthat the tension ofthe springsGil is what determines vthe pressures at which the. diaphragms -orbellows move toward the collapsed or toward the expanded `condition toeffect a movement of the valveposts 55, that is, the diaphragrns orbellows merely act to stabilize the valve vposts and to maintain thesame in the fully opened position whennot subjected to pressures aboveatmospheric' pressure. The oxygen andi the inflammable gasA fiowingthrough the passages 23 and passagesV 25, 25a enter the bushings 41 Vandpass through the openings 51 in the valve posts 55 and thence throughthe bores 56 in the posts and the openings 58 into the recesses 45'and46. The pressures of` the'incoming oxygenl and gas act directly on theends of the valve posts 55and also the pressures of the oxygen and 'gaswhich have passed through the valve posts 55 into the recesses 44 and 46act on the members 5| and the bellows 5D. When the total pressure of theoxygen and the gas reaches a predetermined pointthe bellows ordiaphragme start to collapse and the valve posts 55 and members 5| startto move against the action of the springs 60, whereupon the effectiveareas of the openings 51 in the posts will be gradually diminished bythe openings passing across the annular flanges 49 of the Vbushings 41,it being understood thatthe valve posts 55 have a tight although workingtwithin the annular yiianges 49.

In other wrds,.the volume of oxygen or gas flowing into the recess 44 orthe recess 46 is gradually'diminished as the pressures of the incomingoxygen'and gas increase, and thus the ow pressures of the` oxygen andgas fromthe recesses 44 and 46 to the mixing chamber and the tip ornozzle of the cutting torch or blow pipe is controlled and maintainedsubstantially constant. When the pressure of the incoming oxygen orgasbecomes reduced the parts just enumerated move in the opposite directionunder the action of the springs 60 to increase the effective area of theopenings 51 in the valve posts and thus increase the volume of gas oroxygen owing into the recess 44 or the recess 46 in inverse proportionto the decrease in the pressure of the incoming oxygen or gas.

It will be observed that the restrictions, later to bev referred to, inthe tip or nozzle D to the flow of the gas or oxygen serve to build up aback-pressure to which the members are responsive, and this .results inthe volume of Vgas or oxygen flowing to the tip or nozzle always beingproportional to the restriction in the tip or nozzle. In other words,thefvolume of oxygen or gas flowing to a tip or nozzle provided withrelatively large orices will be greater than .the volume owing to thetip or nozzle that is provided with relatively small orifices, althoughthe flow pressureV in each instance Vwill remain the same or constantwith respect to its setting.

It. will be understood that when the valves 21 are iirst opened andOxygen and gas ows .throughthe passages 2| and 25 to the recesses 44and46,;the valve posts 55 are in the position indicated in Fig. 6, at whichtime theopenings 51A present their `maximum effective areas fortheoxygen Yand@ gas .to flow therethrough into the recesses 445 and46.AHowever, as soon as i the pressure of the oxygen or gas in the recess44 or recess 46' reaches a predetermined amount the volume of the oxygenor gas flowing through the valve posts 55 starts to be diminished, ashas beenstated, by the iianges 49 reducing the effectivearea of theopenings 51. The flow pressure regulating means are so adjusted that theopenings 51 will never be completely closed by the anges 49,'so thatthere 4is always oxygen or gas flowing through the valve posts into therecesses when the'manually operated control valves 21 are opened.However, the effective area of the openings 51 will be changed ininverse proportion to changes in the pressures of the oxygen or gas, sothat the volume of the oxygen or gas owing into the recesses'wll beproportionately varied. 'In this way the iiow pressures of the oxygenand Ygas through the recesses 44 and 46 are `accurately regulated bymeans that does not function with pulsationsr but is smooth and gradualin its operation and provides at .al1 times a. continuous ow of oxygenor gas through the recesses 44 and 46 whenv the manually operatedYcontrol valves 21 are open and insures a constant pressure flow to thetip or nozzle of the torch.

It will be understood that the springs can be separately adjusted sothat different flow pressures can be obtained by the regulating meansand also that the openings 51 may be of the same or different sizes andcan act as metering orices according to the conditions which it isdesired to obtain 'in the torch.

A closure plate 63 is secured to the side of the handle body I6 bysuitable means, such as securingscrews, and covers the block 3| and theclosure plates or members 52, see Figs. 1, 3, 4 and 6.

The recess 44 is connected to a sealed cored recess or groove forming apassage 54 extending longitudinally of the body |0 by means of a shortcircular passage extending from the bottom of the recess andperpendicularly to the passage 64. It will be noted that the passages 64and 65 are in alignment with the passage 23 and that the passage 64,although provided with an 4ofi-set portion, is provided'likewise with aportion parallel to the passages 2| and 23 and is closed and sealed bythe gasket 40 and the closure plates 42 and 43. The recess 46 is incommunication with a passage 66 extending longitudinally of the handlebody |0 from adjacent the bottom of the recess 46 to adjacent theforward or left-hand end of the body. rPhe passage 64 is vincommunication with a short bore 61 by means of a short passage 68-thatextends perpendicularly to the passage 64 and bore 61, as clearly shownin Fig. 2.

The passage 2| for the high pressure oxygen, as'already stated, extendslongitudinally of the handle toward the left-hand end thereof, as viwedinthe drawings, and communicates with a vertically extending bore 69formed in the handle body |'6 through the medium of a laterallyextending passage 10, see Fig. 2. The bore 69 is in communication with:la counterbore 1| formed in the upper side of the body |0 andconcentric to the bore 69. A circular groove surrounds the counterbore1| and is concentric thereto` and receives the annular bead 12 on t'leunderside of a flexible or rubber disk valve The Valve 13 is clamped inposition by means of a clamping plate 13 secured to the upper side ofthe handle by suitable securing means, such as screws, and this plate isprovided with upstanding lugs 15 which receive the fulcrum pin 16 of anoperating lever 11. A leaf spring 18 has one of its ends secured to theupper side of the handle body l0 by a suitable securing screw,

position and to force or distort the disk valve 13 into contact with theend of the bore 69 to close cr seal the same as shown in Fig. 2. It willbe understood, however, that when-the operator depresses the right handend of the lever' 11, as viewed in Fig. 2, the angularly disposedportion 11a of said lever in contact with the angularly disposed portion18a of the spring will raise said spring and relieve the plunger 'le ofthe pressure of the spring, whereupon the high pressure oxygen in thebore B9 will open the disk valve 13 and flow into the counterbore 1|.The counterbore 1l is in communication by means of a vertically disposedpassage 80 with a longitudinally disposed passage 8| formed in thehandle body I and extending toward the left-hand end thereof, as viewedin the drawings.

' 'I'he passages 66, 61 and 8| are in communication, respectively, withvertically spaced and aligned recesses formed in the left-hand end ofthe handle body |0, as viewed in Fig. 2, although it will be noted thatinterposed between said recesses and the passages 66 and 61 are packings82 and threaded tubular members 83 which are located in reduced recessesconcentric to the lower two of the three recesses in the left-hand endof the handle body l0 which have just been referred to. It will also beseen that the packings 82 are provided with openings which can differ insize and form metering orices if 'so desired.

Similar tubes 84 extend into the three vertically spaced recesses in theleft-hand end of the handle body lli and have their ends provided withianges 85 engaging suitable packing members 86 located in the inner endsof the recesses. Mounted on the tubes 84 are sleeves S1 that engage theflanges 85 and tightly fit the recesses in the handle body l0.

The sleeves 81 intermediate their ends are provided with annular ribs B8which position the sleeves in vertically spaced openings formed in abracket plate 89. The bracket plate S9 and the tubes 8-4 can beconnected to or removed from the handle A as a unit, it being noted byreference to Fig. 1 that the bracket plate carries suitable connectingscrews 90 which can be screwed into Vsuitably tapped openings in theleft-hand end of the handle body l0.

The tubes v|34 extend toward the left, as viewed in the drawings, andhave their left-hand ends seated in vertically spaced counterboresformed in the head C of the cutting torch or blow pipe. A suitablyshaped closure and hand grip member 9| surrounds the tubes 84 and hasits rig-hthand end contacting the'bracket plate 89 and its left-hand endtelescoping upon a reduced shoulder formed on the head C of the torch orblow pipe and thus the hand grip portion B and head C of the torch or.blow pipe form a unit applicable to or removable from the handle A,

The uppermost tube 84 which conducts the high pressure oxygen from thepassage 0| to the head is in communication with a passage 02 in the headC which, 4in turn, communicates with a short passage 93 arranged atright angles to the passage 02 and in communication with a counterborein the head C, later to be referred to, and which counterbore receivesthe tip or nozzle.

`The two lower tubes 84, as viewed in Fig. 2. and which are connectedwith the passages'tt` and 61 communicate with the'angularly disposedpassages 91| and 95 in the head Gand, these passages 54 and 95` extendto the mixing chamber in the head C, which chamber is in the form of acircular opening 96 extending transversely of the head and threadedadjacent its middle. portion, while its outer ends are conical in shapeto receive the conical heads of separate orifice plugs 91 that areremovably screwed into the opening 9S from opposite sides of the head.

The plugs 91 are provided with bores 98 and counterbores 99 concentricthereto. The bores 93 are connected by passages |00 with'the annularspaces between the outer periphery of the plugs 91and the wall of the"opening 96 intermediate the conicaliheads of the plugs and the threadedportions thereof, vit being noted by reference to Fig. 8 that thepassages v91| and 95 communicate with .these spaces. A removable mixingmember is mounted in the mixing chamber and comprises-disks |0| locatedin the counterbores 99 of the removable plugs and supporting midwaybetween themselves a baille plate |02. The disks lill are provided-witha plurality of openings or ports |03 through which the gasv and oxygenpass to the center of the mixing chamber. The gas and oxygen passingthrough the ports |03 to the center of the mixing chamber strikes thebaille |02 and a turbulence in the gas and oxygen is thus created in themixing chamber to thoroughly mix the gas and oxygen which passes fromthe mixing chamber through a passage |0ll in the head, as clearly shownin' Figs. 2 and 8.

AThe passage 93 in the head C communicates with the conical or taperedupper end of a threaded bore |05 which, in turn, communicates at itslower end with a counterbore |06 that isin communication with thepassage |04 from the mixing chamber.V The counterbore |06, in turn,communicates with alarger counterbore |01 that is provided on its bottomwall with an annular V-shaped downwardly projecting rib` |08. Thecounterbore |01 communicates with a larger downwardly facing threadedcounterbore |09 and the bores and counterbores just referred to in thehead C receive the inner and outer members of the tip or nozzle D, aswell as the clamping nut which holds said members in assembled positionin the head.

The tip or nozzle D includes an inner member il@ that is threadedexteriorly adjacent its upper end, as indicated at Hl, to enable theinner member |50 to be screwed into the threaded counterbore |05 in thehead and to have the conical upper end H2 of the inner member seatagainstthe conical `or taperedv end of the counterbore |55, as clearlyshown in Fig. 2. The inner member H05 isl provided with a downwardlytapered lower end H3 and witha centrally disposed bore extendingthroughout the length of the member andl composed of a portion lill' ofrelatively large diameter and communicating at its upper end with thepassage S3 in the head and with a portion H5 located in the taperedlower end ||3 of the member and of relatively small or restrictedcross-sectional area.

The periphery of the inner member llt above the tapered lower end of themember and below the threaded upper end thereof is .off concavepolygonal vcr hexagonal coniiguration, as -indicated `at 'l it in Figs.2 and l0, it being noted that the corners or angles H1 of the portion ofthe inner member that is ofl hexagonal crosssection are relatively sharpfor a purpose later to be explained.

. The tapered lower end H3 of the inner member is provided Aenitsperiphery-with alplurality of longitudinally extending `V-shapedgrooves H8, as clearly' indicated in Figs.-2 and 11.` The outer or shellmember II9 of the tip or nozzle is tubular in shapeand is inwardlytapered adjacent its lower end, as indicated at |20,'v such taperedlower end |20 of the outer member extending slightlybelow the end of thetapered portion I I3 of the inner member when the members are assembledin the head as clearly shown in Fig. 2. i

The 'outer member I I9 telescopes upon the inner member |I and isprovided at its upper end with an outwardly extendingflange |2I locatedin the counterbore |01 of the head and in engagement with the sharp edgeof the taperedf'rib |08 in said counterbore, as clearly shown in Fig. 2.The Aouter member II9 of the tip'or nozzle is held in assembled positionwith respect to the inner member and the head C by means of an assemblyor Vclamping nut |22 screwed into the threaded counterbore |09' of theheadstock and having a tapered or pointed inner edge -|23 engaging apacking gasket interposed between said edge and the underside of theange IV2I of the outer member.

It will be seen that the assembly nut |22 holds the flange I 2| in tight`engagement with the pointed edge of the tapered rib I 08, and it shouldbe understood that when the inner and outer members ofthe tip or nozzleare assembled the sharp corners II1 of the portion of the inner memberthat is of hexagonal cross-section embed themselves in the outer memberor Vshell and prevent relative turning movement between the saidmembers. It will also be understood that the concaved hexagonalcross-section ||6 of the inner member .provides longitudinally extendingpassages between the inner and outer members and these passagescommunicate at their upper ends with the counterbore I 01 inthe headwhich,

in turn, is in communication with the counter` bore I 06 Vand at theirlower ends with the V- shaped grooves ||8 in the tapered end II3 of theinner member, such grooves constituting passages between the tapered endII3 of the inner member and the tapered end*v of the outer or shellmember.

The operation and mode of use of the cutting torch or blow pipehereinbefore described will now be set f-orth in order to coordinate thevarious parts of the preceding description and to more clearly'bring outthe advantages inherent in a cutting torch or blow pipe embodying theinvention.

Assuming thatthetwo fittings I2 are connected by the conduits' I3 and I4to suitable sources of oxygen and viniiammable gas under pressure, andthat the torch is to be used for the cutting of metal, the operatorrstmoves the operating member or lever 36 to rock the shaft 32 from theposition shown in Fig. 4 to the position shown in Fig. 3 to effectopening movement of the valves 21. The oxygen is then free to flow fromthe passage I5 through the passage I1 into the counterbore I9, andthence through the passage 22 and passage 23 into the recess 4.4. Theoxygen also iiows from the passage I5 through the passage I1 into thelongitudinally extending passage 2|, but at this time the valve 13 isclosed, as indicated in Fig. 2, and there is no flowof high pressureoxygen from the passage 69 to the passage 8|. The iniiammable gas is nowfreeto iiowv from the passagel I6 through the passage I8 into thecounterbore 24 and thence throughthe passages 26, 25 and 25a to therecess 46. Y -Y f It will be understood that the iiow of oxygen andinflammable gas to the recesses 44 and 46, respectively, is controlledby the pressure responsive devices mounted in said recesses andV clearlyshown in Fig. 6v and hereinbefore described.

The oxygen iiows from the recess 44 through the passages 65, 64, 83 and61 to the middle tube 84, while the inflammable gas ows from the recess46 through the passage 66 to the lower tube 84. The oxygen and gas owingthrough said tube passes through the passages 94 and 95 in the head C tothe mixing chamber and then the intermixed oxygen and gas flows throughthe passage |04 in the head, counterbores |06, |01 and passages |I6 and8 in the tip or nozzle to the lower end of the latter. The operatorignites the intermixed oxygen and gas emerging from the lower end of thetip or nozzle and which isin the form of a combustible mixture and usesthis ignited mixture to heat the metal preparatory to the cuttingoperation.

It will be understood that the pressure responsive devices in therecesses 44 and 45 maintain the ow pressures of the oxygen and gassubstantially constant,ev`en though pressure Vchanges may occur inthesources of supply of the oxygen or gas. f

When the metal has been heated sumciently for the cutting thereof theoperator depresses the right-hand end of the lever 11 to raise thespring 18 and allow the high pressure oxygen to open the valve 'I3 andto flow through the counterbore f 1I, passages 80, 8|', upper tube 84 tothe passages 92 and 93 in the head, from whence it flows through theportions II4 and |I5 of the bore through the inner memberof the tip ornozzle and is emitted from the lower end Aof the nozzle in the form of ajet which strikes the heated metal alonglthe'line of the cut anddestroys the carbon therein to eiect a severing of the metal.

As soon as the operator releases the pressure of his hand on the lever11 the spring 18 returns the lever to the position shown'in Fig. 2 and-forces the plunger 19 inwardly to distort the valve 13 to close thepassage 69 and stop the flow of high pressure oxygen through the torchor blow pipe.

Of course where the torch or blow pipe is used merely for weldingmetal,` it will not be necessary for the operator to manipulate thelever since no jet of high pressure oxygen is required in the weldingoperation but merely'the flame of the intermixed low pressure oxygen andgas.

In Fig. 9 the valve arrangement for controlling the high pressure oxygenis slightly different in construction from that shown in Fig. 2. In Fig.9 the end of the passage 69 where it communicates with the counterbore1| is rounded, where as in Fig. 2 it is formed with sharp corners. Thearrangement shown in Fig. 9 may be more desirable as the exible disk canbe distorted into the passage 69 more uniformly.

From the foregoing description it will have been seen that the cuttingtorch or Iblow pipe embodying the invention "is 'not only efficient inoperation but can be readily manipulated or handled by the operatorwhile the various parts of the torch or blow pipe are so designed from amanufacturing standpoint as to enable them to be economically'producedand readily assembled and disassembled.

Although a'preferred embodiment of the invention has been'illustratedand-described herein the invention is susceptible of various modicationsand adaptations within the scope of the appended claims.

Having thus described my invention I claim:

1. In a torch of the character described a body having grooves in oneside face of the body, a closure plate secured to said side face of thebody and closing the said grooves to form uid conducting passages forthe preheating inflammable gas and the preheating oxygen, said bodybeing provided in its other side face with recesses, fluid conductingpassages in said body interconnecting said first passages and saidrecesses, uid conducting passages in said body communicating with saidrecesses and adapted to be connected to a source of supply of inammablegas and oxygen, valves located in said recesses for closing said lastnamed fluid conducting paspassage, and plates secured to said sides ofthe body and closing the outer end of said recess and the outer side ofsaid channel to form with the latter a passage for a preheating fluid,

JOHN C. CROWLEY.

